Imagination and suspension of disbelief are also critically important.

Cybersex can occur either within the context of existing or intimate relationships, e.g.

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While it does not involve physical contact, critics claim that the powerful emotions involved can cause marital stress, especially when cybersex culminates in an Internet romance.

In several known cases Internet adultery became the grounds for which a couple divorced.

It can also be performed using webcams, voice chat systems like Skype, or online games and/or virtual worlds like Second Life.

The exact definition of cybersex—specifically, whether real-life masturbation must be taking place for the online sex act to count as cybersex—is up for debate.

Often these personas develop complex past histories for their characters to make the fantasy/roleplay even more life like, thus the evolution of the term "real cybering".

However, since for many the primary point of cybersex is the plausible simulation of sexual activity, this knowledge is not always desired or necessary.

It is also fairly frequent in online role-playing games, such as MUDs and MMORPGs, though approval of this activity varies greatly from game to game.

Some online social games like Red Light Center are dedicated to cybersex and other adult behaviors. In other games of the wider MMORPG genre, it ranges from widely accepted to the point of game masters/moderators taking part, such as in Final Fantasy Online.

Unlike phone sex, cybersex in chat rooms is rarely commercial.